#!/bin/bash
-# Copyright (C) 2014 Ian Kelling
-# This program is under GPL v. 3 or later, see <http://www.gnu.org/licenses/>
+# I, Ian Kelling, follow the GNU license recommendations at
+# https://www.gnu.org/licenses/license-recommendations.en.html. They
+# recommend that small programs, < 300 lines, be licensed under the
+# Apache License 2.0. This file contains or is part of one or more small
+# programs. If a small program grows beyond 300 lines, I plan to switch
+# its license to GPL.
+
+# Copyright 2024 Ian Kelling
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+# http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
teeu() {
- local help="Usage: appendu [-h|--help] FILE [LINE]
-
-Tee unique. Append each LINE or if none, each stdin line to FILE if it does not exist in FILE.
-
- [-h|--help] display this message"
-
- if [[ $1 == --help || $1 == -h ]]; then
- echo "$help"
- return
- fi
-
- if (( ${#@} == 0 )) ; then
- echo "teeu error: need 1 or more arguments"
- echo "$help"
- return 1
- fi
- local MAPFILE
- (( ${#@} >= 2 )) && MAPFILE="${@:2}" || mapfile -t
- for line in "${MAPFILE[@]}"; do
- grep -xFq "$line" "$1" &>/dev/null || tee -a "$1" <<<"$line"
- done
- return 0
+ local help="Usage: teeu [-h|--help] FILE [LINE]
+Append LINE if it's not already in FILE
+
+If no LINE is specified, process each line from STDIN.
+teeu is short for tee unique.
+
+-h|--help display this message"
+
+ if [[ $1 == --help || $1 == -h ]]; then
+ echo "$help"
+ return
+ fi
+
+ if (( ${#@} == 0 )) ; then
+ echo "teeu error: need 1 or more arguments"
+ echo "$help"
+ return 1
+ fi
+ file="$1"
+ shift
+ local MAPFILE
+ if [[ $1 ]]; then
+ MAPFILE=("$*")
+ else
+ mapfile -t
+ fi
+ for line in "${MAPFILE[@]}"; do
+ grep -xFq "$line" "$file" &>/dev/null || tee -a "$file" <<<"$line"
+ done
+ return 0
}
teeu "$@"